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Ultras

Ultras, and what they ask of you

Cutoffs, crew access, drop bags, and where your people can park. Nothing here needs an account.
Free, and always will be. NavRun makes money from race-day planning for runners who want it, never from this. Ultras change constantly, sometimes the morning of. Always confirm with the race director and the official website before you rely on anything here.
Not sure which one yet? Watch one first. Course previews and films, made by people who were out there.
883 races

Every race we hold Twenty five at a time. Search a race by its name, or by the name it used to have.

Blues Cruise

Reading, PA, US · October 4, 2026 (12 days ago)
Ran · this year's race is done. 50K

Bobcat Trail Races

Colorado Springs, CO, US · October 17, 2026 (tomorrow)
Registration closed 31 miles15.36 miles6.5 miles3.68 miles

Bogus 50/50

Boise, ID, US · September 26, 2026 (20 days ago)
Ran · this year's race is done. 50 Mile30.8 miles16.2 miles

Bohemian Alps 50K

Brainard, NE, US · October 24, 2026 (in 8 days)
Registration open 50K

Bong Nonsense

Brighton, WI, US · September 26, 2026 (20 days ago)
Ran · this year's race is done. 12hrs3hrs6hrs

Bonneville Backyard Ultra

Provo, UT, US · April 24, 2027 (in 190 days)
Registration open Backyard Ultra

Booneville Backroads Ultra

Booneville, IA, US · September 5, 2026 (41 days ago)
Ran · this year's race is done. 100 Mile61.4 miles31.1 miles6.2 miles

Bosque Bigfoot Trail Runs

Albuquerque, NM, US · November 28, 2026 (in 43 days)
Registration open 8 miles25K50K

Boulder Field 100

Jim Thorpe, PA, US · September 12, 2026 (34 days ago)
Registration open 100K50K18 miles

Boundiful Endurance Runs

Hemet, CA, US · November 28-29, 2026 (in 43 days)
Registration open 100 Mile12hrs24hrs3hrs6hrsRelay Event

Brazos Bend 100

Needville, TX, US · December 5-6, 2026 (in 50 days)
Registration open 100 Mile100KMarathonHalf Marathon

Brazos Legend

Waco, TX, US · April 3, 2027 (in 169 days)
Registration open 50 Mile20 miles10.09 miles2.96 miles50K

Bridge Burner Ultra

Canon City, CO, US · October 24, 2026 (in 8 days)
Registration open 35.5 miles30.9 miles21.9 miles7 miles

Bristow Loop Race

Dexter, OR, US · June 5-6, 2027 (in 232 days)
On the calendar 12 Hour Day12 Hour Night24hrs6hrs

Broken Anvil Backyard Ultra

West Point, IA, US · September 18, 2027 (in 337 days)
On the calendar 4.167 miles

Broken Rock Trail Runs

Dodgeville, WI, US · October 10, 2026 (6 days ago)
Ran · this year's race is done. 30.75 miles20.5 miles10.25 miles

Brookfield Classic

Brookfield, NY, US · August 28, 2027 (in 316 days)
Registration open 15K50K5K

Bryce Canyon Ultras

Hatch, UT, US · September 18-19, 2027 (in 337 days)
On the calendar 100 Mile50.2 miles37.4 miles33.2 miles19.3 miles14 miles

Buck 50

Kattskill bay, NY, US · October 3, 2026 (13 days ago)
Ran · this year's race is done. 50K

Buckeye Ultra 200 Mile Road Race

Ashtabula, OH, US · September 9, 2027 (in 328 days)
Registration open 203 miles100 Mile

Burney Mountain 100

Cassel, CA, US · June 18, 2027 (in 245 days)
Registration open 100 Mile

Burning Man Ultra

Black Rock City, NV, US · August 31, 2027 (in 319 days)
On the calendar 50K

C&O Canal 100

Knoxville, MD, US · April 24-25, 2027 (in 190 days)
On the calendar 100 Mile

Cactus Roulette Endurance Event

Lawrence, KS, US · January 23-24, 2027 (in 99 days)
Registration open 12 Hour Lark12 Hour Owl24 Hour6 Hour

Cahuilla Rez Ultra

Anza, CA, US · November 14, 2026 (in 29 days)
Registration open Half Marathon100 Mile12hrs24hrs6hrs5K
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How this gets better. Every race here was read off the race's own pages and sourced fact by fact. Where nobody has checked something, it says so instead of guessing.
See something wrong or out of date? Open the race and use the form at the bottom of its page.
Are you the race director? The same page has a form that comes straight to us, and we write back.
Anything else: [email protected]
Got one on the calendar?

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